Thermal Comfort Local Thermal Discomfort
Thermal Comfort Local Thermal Discomfort
Thermal Comfort Local Thermal Discomfort
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<strong>Local</strong> <strong>Thermal</strong> <strong>Discomfort</strong><br />
• Equivalent frequency<br />
The equivalent frequency, f e , of a randomly fluctuating velocity is<br />
defined as the frequency of sinusoidal velocity fluctuations with<br />
the same ratio of the standard deviation of acceleration to the<br />
standard deviation of air velocity as in the random velocity<br />
fluctuations. It is an integral measure for the frequency of the<br />
velocity fluctuations of a turbulent flow.<br />
0,3<br />
f<br />
e<br />
=<br />
1<br />
2π<br />
⋅<br />
SD<br />
SD<br />
a<br />
v<br />
Air Velocity (m/s)<br />
0,2<br />
0,1<br />
a = ΔV/Δτ s<br />
ΔV<br />
Δτ s<br />
0<br />
15 17 19 21 23 25<br />
Time(s)<br />
17
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